tnx lot. complete answer.

i'm in trading company,in Odoo13, I need the sales price to be updated automatically after entering the vendor price to be able to quote the updated price to my customer.

but now it does not do automatically !

it only does when I manually change the QTY in the sales QUOTATION.

Is there any way to update the sales price automatically based on the vendor price?

You can use pricelist, and select cost - (-20%)

i didnt get right answer after configuring price formula